EP0337719A2 - Verfahren zur Herstellung einer thermoplastischen Kunststoffolie und deren Verwendung als Puffermaterial - Google Patents

Verfahren zur Herstellung einer thermoplastischen Kunststoffolie und deren Verwendung als Puffermaterial Download PDF

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Publication number
EP0337719A2
EP0337719A2 EP19890303547 EP89303547A EP0337719A2 EP 0337719 A2 EP0337719 A2 EP 0337719A2 EP 19890303547 EP19890303547 EP 19890303547 EP 89303547 A EP89303547 A EP 89303547A EP 0337719 A2 EP0337719 A2 EP 0337719A2
Authority
EP
European Patent Office
Prior art keywords
thermoplastic resin
film
matrix
tapes
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890303547
Other languages
English (en)
French (fr)
Other versions
EP0337719B1 (de
EP0337719A3 (de
Inventor
Yoshiaki Momose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JSP Corp
Original Assignee
JSP Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63088244A external-priority patent/JP2545576B2/ja
Priority claimed from JP63099720A external-priority patent/JP2610938B2/ja
Application filed by JSP Corp filed Critical JSP Corp
Publication of EP0337719A2 publication Critical patent/EP0337719A2/de
Publication of EP0337719A3 publication Critical patent/EP0337719A3/de
Application granted granted Critical
Publication of EP0337719B1 publication Critical patent/EP0337719B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • Y10T428/3192—Next to vinyl or vinylidene chloride polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31928—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31942—Of aldehyde or ketone condensation product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31942—Of aldehyde or ketone condensation product
    • Y10T428/31946—Next to second aldehyde or ketone condensation product

Definitions

  • This invention relates to a thermoplastic resin film having a good gas barrier property and to a method of producing same.
  • the present invention is also directed to a cushioning material using the above film.
  • thermoplastic resin film having a gas barrier property is a composite film having a core, gas barrier layer formed of a polyamide, two adhesive layers provided on both sides of the core layer, and two surface layers formed of a polyolefin and provided for covering the adhesive layers.
  • a composite film is difficult to prepare and requires a complicated extrusion machine. Additionally, there is not available a fully suitable adhesive for bonding the surface layers to the core layer.
  • a gas barrier film which includes a matrix film formed of a polyolefin and containing fine particulate resin having a gas barrier property and uniformly dispersed in the matrix. While such a blend film may be fabricated more easily as compared with the above composite film, the gas barrier property of the blend film is not so excellent as the composite film, unless the particulate resin is used in a large amount. Further, the blend film lacks clarity because of the light scattering caused by the very fine particulate resin contained in the film.
  • thermoplastic resin film comprising a matrix in the form of a film and formed of a first thermoplastic resin, and a plurality of substantially continuous tapes dispersed within said matrix sheet with the plane of each of said tapes being substantially parallel with the plane of said matrix sheet and each formed of a second thermoplastic resin different from said first resin.
  • the present invention provides a cushioning material comprising two, first and second films, at least one of said first and second films being formed to provide one or more discrete embossments, and said first and second films being bonded to form a substantially unitary structure and to seal said embossments so that one or more air-tight cells are defined between said first and second films, characterized in that at least one of said first and second films is the above thermoplastic resin film.
  • the present invention also provides a method of fabricating a thermoplastic film, comprising the steps of: providing a first melt of a first thermoplastic resin; providing a second melt of a second thermoplastic resin different from said first resin; continuously feeding said first and second melts simultaneously to an inlet port of a static mixer and allowing them to pass therethrough, so that a mixture comprising a matrix formed of said first resin, and a plurality of substantially continuous, parallel tapes dispersed within said matrix is formed; continuously discharging said mixture from an outlet port of said static mixer; and continuously extruding said mixture through a die.
  • thermoplastic film designated generally as 1 is a thermoplastic film according to the present invention.
  • the film 1 is composed of a matrix film 2 formed of a first thermoplastic resin, and a plurality substantially continuous tapes 3 formed of a second thermoplastic resin exhibiting better gas barrier property (lower gas-permeability) than that of the first resin and generally substantially uniformly dispersed within the matrix 2.
  • the plane of each of the tapes 3 is substantially parallel with the plane of the matrix 2.
  • the thermoplastic resin film of the present invention can exhibit significantly improved gas barrier property as compared with a known film having dispersed therein fine particles of the second thermoplastic resin. More specifically, since a plurality of gas barrier tapes 3 are dispersed in the matrix 2, the gas barrier property of the film 1 is comparable to that of a known laminated film. Further, since no fine particles are present in the matrix 2, the film 1 shows good clarity or see-through property.
  • Each of the tapes 3 generally has a width of 0.1 ⁇ m or more and preferably has a thickness of in the range of 0.01 to 5 ⁇ m, more preferably 0.1 to 1.5 ⁇ m.
  • the content of the tapes 3 is preferably 1-40 %, more preferably 1-25 % based on the total volume of the tapes 3 and the matrix 2.
  • the thickness of the matrix varies with the purpose for which the film 1 is used, but generally in the range of 2.5 ⁇ m to 1.6 mm.
  • the matrix 2 preferably has a thickness of 2.5-80 ⁇ m, more preferably 5-30 ⁇ m.
  • the matrix 2 preferably has a thickness of 0.02-1.6 mm, more preferably 0.05-0.4 mm.
  • the first resin may be, for example, a polyolefin such as polyethylene or polypropylene, a polystyrene, a polyacrylonitrile, a polyester, a polycarbonate, a polyvinyl chloride, or a modified resin thereof.
  • the second resin may be, for example, a polyamide, a saponified ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, a polyvinylidene chloride or a polyacrylonitrile copolymer.
  • the use of a polyamide such as a m-xylylenediamine-type polyamide, Nylon 6 or Nylon 6,6 as the second resin is preferred for reasons of good gas barrier properties.
  • the m-xylylenediamine-type polyamide may be a polymer containing at least 70 mole % of a segment obtained by reaction of (A-1) m-xylylenediamine or (A-2) a mixture of at least 70 mole % of m-xylylenediamine and less than 30 mole % of p-xylylenediamine with (B) an ⁇ , ⁇ -aliphatic dicarboxylic acid having 6-10 carbon atoms.
  • m-xylylene­diamine type polyamide examples include poly(m-xylylenediadipamide), poly(m-xylylenesebacamide), poly(m-xylylenesberamide), m-­xylylene/p-xylyleneadipamide copolymer, m-xylylene/p-xylylene­pimelamide copolymer, m-xylylene/p-xylylenenazelamide, copolymers of the above with an aliphatic amine such as hexamethylenediamine, an alicyclic amine such as piperazine, an aromatic diamine such as p-bis(2-aminoethyl)benzene, an aromatic dicarboxylic acid such as terephthalic acid, lactum such as ⁇ -­caprolactum, a ⁇ -aminoaliphatic carboxylic acid such as ⁇ -­aminoheptanoic acid, or an amino aromatic carb
  • Fig. 2 depicts one preferred apparatus for the fabrication of the above-described film according to the present invention.
  • a first resin for forming the matrix 2 is fed to an extruder 10, while a second resin for forming the tape 3 is fed to an extruder 11, where they are melted.
  • the melts are continuously extruded from the extruders 10 and 11 and simultaneously introduced into a static mixer 12 where they are mixed and divided into layers.
  • static mixer is meant a motionless mixer, sometimes called an interfacial surface generator, in which a stream of liquid is divided, laterally expanded and recombined to provide mixing.
  • a static mixer is known and commercially available.
  • FIG. 3 One preferred static mixer is diagrammatically shown in Fig. 3, in which the reference numeral 5 denotes a tubular housing defining an axially extending fluid flow passage 6 therein.
  • a plurality (four in the illustrated case) of twisted baffle elements 7a, 8a, 7b and 8b are disposed in the passage 6. These elements are twisted through an angle of 180°.
  • the elements 7a and 7b are each twisted in the direction opposite to that of the elements 8a and 8b.
  • the clockwise and counterclockwise elements are alternately arranged with the edge of one element (e.g. element 8a) being oriented perpendicularly to its adjacent element (e.g. element 7b).
  • a liquid introduced into the passage 6 is divided into two streams and is rotated clockwise through an angle of 180° upon passage through each of the elements 7a and 7b and counterclockwise through the same angle upon passage through each of the elements 8a and 8b. Further, the liquid moves laterally from the center portion toward the periphery portion and from the periphery portion toward the center portion. As a result, as shown in Figs. 4(a) through 4(d), the liquid is divided and layered into 16 layers after the passage through the four elements 7a, 8a, 7b and 8b.
  • the inside diameter of the tubular housing 5 and the number of the elements 7 and 8 have an influence upon the width of the tapes 3 (Fig. 1).
  • the inside diameter of the tubular housing 30 is preferably 10-50 mm, more preferably 20-40 mm and the total number of the elements 31 and 32 are preferably 5-15, more preferably 8-12.
  • the resin melt thus mixed in the static mixer 12 is then extruded through a T-die 13 into a film.
  • the extrudate in the form of a film is cooled during its passage around the cooling rolls 14 and 15 and is guided by a guide roll 16 to a take-up roll (not shown) as a product film 1 whose cross section along a line perpendicular to the direction along which the film runs is as shown in Fig. 1.
  • thermoplastic film thus obtained, a portion cf the tapes 3 can expose on the surface. While this does not adversely affect the gas barrier property of the film, other properties thereof, such as smoothness of the surface and resistance to water, are subjected to the property of the resin forming the tapes 3.
  • one or two outer films are laminated on at least one side of the matrix 2.
  • the outer film or films are each formed of a third thermoplastic resin different from the resin of which the tapes 3 are formed.
  • the third resin may be the same as the first resin of which the matrix 2 is formed.
  • Such a laminate film may be suitably prepared in a manner as illustrated in Fig. 5, in which the same reference numeral designates similar component part in Fig. 2.
  • the same resin is used as the first resin for the formation of the matrix and as the third resin for the formation of the outer film.
  • first and second resins are continuously extruded from extruders 10 and 11, respectively and the extrudates are combined and introduced into a static mixer 12 for layering.
  • the layered mixture discharged from the static mixer 12 is introduced into a laminating device 20 where the layered mixture is laminated with a layer of the first resin introduced from the extruder 10 through a line 19.
  • the laminate is then extruded through a T-die 13 into a laminate film 1.
  • the film 1 is cooled and collected in the same manner as in Fig. 2.
  • Such a laminate film may also be prepared by superimposing a film or two films of the third resin and the film obtained in the manner as described previously with reference to Fig. 2, and compression molding the superimposed layers with heating to form an integrally laminated film.
  • thermoplastic resin film according to the present invention can be fabricated in a simpler way as compared with known five-­layered composite film.
  • the film of the present invention exhibits gas barrier property comparable to the known composite film and far superior gas barrier property as compared to known film containing particles of a gas barrier resin.
  • the inventive film is clear and has good see-through property.
  • the film according to the present invention is suitably used as a wrapping or packaging film.
  • the thermoplastic resin film of the present invention is advantageously used for the formation of a cushioning material.
  • the cushioning material which is designated includes two, first and second films 38 and 39. At least one of the first and second films 38 and 39 (the first film 38, in the illustrated case) is formed to provide one or more discrete embossments 33. The first and second films 38 and 39 are bonded to form a substantially unitary structure and to seal the embossments 33 so that one or more air-tight cells 32 are defined between the first and second films 38 and 39. At least one of the first and second films 38 and 39 (both first and second films 38 and 39 in the illustrated case) is the thermoplastic film according to the present invention.
  • each of the thermoplastic films 38 and 39 is a laminated film having a core, matrix film 30 (30′) in which a plurality of thermoplastic tapes (not shown) are dispersed as described previously, and two outer films 35 (35′) and 36 (36′) provided on both sides of the core film 30 (30′).
  • Figs. 7 and 8 show alternate embodiments of the cushioning material of the present invention, in which the same reference numerals designate similar component parts.
  • the cushioning material of Fig. 7 is formed from two films 30 and 30′ each having no outer films, while the cushioning material of Fig. 8 is formed from two laminated films 38 and 39 each having an outer film 35 (35′) provided over one side of the matrix film 30 (30′).
  • Oxygen permeability is measured using OXTRAN 100 manufactured by Modern Control Inc. under conditions involving a temperature of 20 °C, an inside relative humidity of 100 % and an outside relative humidity of 65 %.
  • a film consisting of a matrix film in which a plurality of tapes were dispersed was prepared using an apparatus as shown in Fig. 2.
  • a polyethylene (Melt Index: 2.0 g/10 min) was used as a first thermoplastic resin for forming the matrix film, while a poly(m-xylyleneadipamide) (hereinafter referred to as MXD6) was used as a second thermoplastic resin for forming the tapes.
  • the first resin was extruded from an extruder having an inside cylinder diameter of 50 mm at a cylinder temperature of 260 °C and a discharge rate of 10 kg/hour.
  • the second resin was extruded from an extruder having an inside cylinder diameter of 30 mm at a cylinder temperature of 260 °C.
  • the extrudates were continuously fed to a static mixer composed of a tubular housing having an inside diameter of 30 mm and seven twisted baffle elements disposed in series within the tubular housing.
  • the layered mixture discharged from the static mixer was extruded through a T-die to obtain a film having a thickness of 50 ⁇ m and a content of the tapes (i.e. second resin) of 5 % based on the volume of the matrix (i.e. first resin)
  • the film was tested for its haziness and oxygen permeability. The results were as summarized in Table 1 below.
  • Example 1 was repeated in the same manner as described except that nylon 6 (hereinafter referred to as N-6) was used in lieu of MXD-6. The results are shown in Table 1.
  • Example 1 was repeated in the same manner as described except that polystyrene was used in lieu of polyethylene as the first resin and that the discharge rate of the second resin in the extruder was increased so that the amount of the second resin was increased to 25 % based on the volume of the first resin.
  • the results are shown in Table 1.
  • Example 3 was repeated in the same manner as described except that nylon 6 was used in lieu of MXD-6. The results are shown in Table 1.
  • Example 1 was repeated in the same manner as described except that the discharge rate of the second resin in the extruder was increased so that the amount of the second resin was increased to 35 % based on the volume of the first resin. The results are shown in Table 1.
  • Example 5 was repeated in the same manner as described except that nylon 6 was used in lieu of MXD-6. The results are shown in Table 1.
  • Example 1 was repeated in the same manner as described except that the second resin (MXD6) was not used, thereby to obtain a film formed of polyethylene whose properties are shown in Table 1.
  • Comparative Example 1 was repeated in the same manner as described except that polystyrene was used in lieu of polyethylene. The results are shown in Table 1.
  • a composite film consisting of a core, matrix film in which a plurality of tapes were dispersed, and two outer films provided over both sides of the core film was prepared using an apparatus as shown in Fig. 5.
  • Polyethylene (melt index: 2.0 g/10 min) was used as the first and third resins for forming the matrix and outer films.
  • MXD6 was used as a second resin for forming the tapes.
  • the first and second resins were extruded with the extruders used in Example 1 and mixed with the static mixer used in Example 1.
  • the layered mixture was combined with the third resin (the same as the first resin) and the extruded through a T-die to obtain the composite film having a total thickness of 350 ⁇ m.
  • the two outer films each had a thickness of about 100 ⁇ m.
  • the content of the tapes (i.e. second resin) in the core, matrix film was 10 % based on the volume of the matrix (i.e. first resin) and the tapes (i.e. second resin).
  • the composite film thus obtained had an oxygen permeability of 7.2 cc ⁇ mm/m2 ⁇ day ⁇ atm.
  • the outer layers were found to be tightly adhered to the core layer.
  • Example 7 was repeated in the same manner as described except that the amount of the tapes was increased to 20 % by volume based on the matrix.
  • the resulting composite film had an oxygen permeability of 4.5 cc ⁇ mm/m2 ⁇ day ⁇ atm and showed excellent inter-layer bonding.
  • Example 8 was repeated in the same manner as described except that the mixing of the first and second resins was effected in the extruder rather than the static mixer.
  • the resulting composite film had an oxygen permeability of 83.3 cc ⁇ mm/m2 ⁇ day ⁇ atm and showed excellent inter-layer bonding.
  • the see-through property of this film was bad (i.e. haziness was high) as compared with those of Examples 7 and 8.
  • a cushioning material as shown in Fig. 7 was prepared.
  • Each embossment 33 had a top diameter ("a" in Fig. 7) of 10 mm and a height ("b" in Fig. 7) of 4 mm.
  • the embossments were spaced apart from neighboring ones with a distance of 10 mm.
  • the thicknesses of the films 30 and 30′ were 30 ⁇ m and 20 ⁇ m, respectively.
  • the films 30 and 30′ were prepared in a manner similar to that in Example 1 and were each composed of a matrix formed of a polyethylene and a plurality of tapes formed of MXD6 and dispersed in the matrix.
  • the content of MXD6 in each of the films 30 and 30′ was 5 % based on the volume of the matrix (polyethylene) and tapes (MXD6).
  • the haziness, oxygen permeability and creep resistance of the cushioning material are summarized in Table 2.
  • Example 9 was repeated in the same manner as described except that the content of MXD6 was increased to 15 % (Example 10), 25 % (Example 11) and 35 % (Example 12) based on the volume of the polyethylene matrix and MXD6 tapes.
  • the properties of the cushioning materials are shown in Table 2.
  • Example 9 was repeated in the same manner as described except that no MXD6 tapes were incorporated into each of the films 30 and 30′.
  • the properties of the cushioning material are shown in Table 2.
  • Example 10 was repeated in the same manner as described except that the mixing of polyethylene and MXD6 was effected in the extruder rather than the static mixer.
  • the resulting cushioning material had properties shown in Table 2.
  • Table 2 Example Amount of MXD6 (vol %) Haziness (%) Permeability (cc ⁇ mm/m2 ⁇ day ⁇ atm) Creep resistance (%) 9 5 10.1 5.9 7 10 15 9.8 2.4 5 11 25 9.3 1.3 4 12 35 8.9 0.9 4 Comp.5 0 10.4 120 58 Comp.6 15 36.4 58 50
  • a cushioning material as shown in Fig. 8 was prepared.
  • the films 38 and 39 were prepared in a manner similar to that in Example 7 except that the matrix film 30 (30′) was provided with only one outer layer 35 (35′) on its one side.
  • Each of the matrix films 30 and 30′ was composed of a matrix formed of a polyethylene and a plurality of tapes formed of MXD6 and dispersed in the matrix.
  • Each embossment 33 had a top diameter ("a" in Fig. 8) of 10 mm and a height ("b" in Fig. 8) of 4 mm.
  • the thicknesses of the layers 30, 30′, 35 and 35′ were 15 ⁇ m, 10 ⁇ m, 15 and 10 ⁇ m, respectively.
  • the content of MXD6 in each of the films 30 and 30′ was 10 % based on the volume of the matrix (polyethylene) and tapes (MXD6).
  • the haziness, oxygen permeability and creep resistance of the cushioning material are summarized in Table 3.
  • the cushioning material had a high inter-layer bonding.
  • Example 13 was repeated in the same manner as described except that the content of MXD6 was increased to 30 % based on the volume of the polyethylene matrix and MXD6 tapes.
  • the properties of the cushioning materials are shown in Table 3.
  • Example 13 was repeated in the same manner as described except that no MXD6 tapes were incorporated into each of the films 30 and 30′.
  • the properties of the cushioning material are shown in Table 3.
  • Example 14 was repeated in the same manner as described except that the mixing of polyethylene and MXD6 was effected in the extruder rather than the static mixer.
  • the resulting cushioning material had properties shown in Table 3.
  • Table 3 Example Amount of MXD6 (vol %) Haziness (%) Permeability (cc ⁇ mm/m2 ⁇ day ⁇ atm) Creep resistance (%) 13 10 10.7 6.9 8 14 30 13.4 3.0 6 Comp.7 0 6.2 120 58 Comp.8 30 28.7 66 45

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
EP19890303547 1988-04-12 1989-04-11 Verfahren zur Herstellung einer thermoplastischen Kunststoffolie und deren Verwendung als Puffermaterial Expired - Lifetime EP0337719B1 (de)

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JP63088244A JP2545576B2 (ja) 1988-04-12 1988-04-12 熱可塑性樹脂フイルム及びその製造方法
JP88244/88 1988-04-12
JP63099720A JP2610938B2 (ja) 1988-04-22 1988-04-22 積層緩衝材及びその製造方法
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EP0456483A2 (de) * 1990-05-09 1991-11-13 Tokai Kogyo Kabushiki Kaisha Geformte Dichtungsleiste und Vorrichtung und Verfahren zu ihrer Herstellung
EP0456483A3 (en) * 1990-05-09 1992-03-25 Tokai Kogyo Kabushiki Kaisha Moldings and apparatus and process for manufacturing the same
EP0644226A1 (de) * 1992-11-06 1995-03-22 Daicel Chemical Industries, Ltd. Leicht reissbare folie und deren herstellungsverfahren
EP0644226A4 (de) * 1992-11-06 1995-05-24 Daicel Chem Leicht reissbare folie und deren herstellungsverfahren.
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US6054209A (en) * 1992-11-06 2000-04-25 Daicel Chemical Industries, Ltd. Easy tearable films and method of producing the same
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US5443867A (en) * 1993-10-25 1995-08-22 E. I. Du Pont De Nemours And Company Articles incorporating barrier resins
US6899453B2 (en) 2000-10-17 2005-05-31 Sika Schweiz Ag Static mixer and method for mixing a main component with an additive
WO2002032562A1 (de) * 2000-10-17 2002-04-25 Sika Ag, Vorm. Kaspar Winkler & Co. Statikmischer und verfahren zum vermischen einer hauptkomponente mit einer zusatzkomponente
EP1710012A2 (de) * 2000-10-17 2006-10-11 Sika Technology AG Vorrichtung aufweisend einen Statikmischer mit einer Mischerkanalverlängerung
EP1710012A3 (de) * 2000-10-17 2007-08-01 Sika Technology AG Vorrichtung aufweisend einen Statikmischer mit einer Mischerkanalverlängerung
CN101524892B (zh) * 2003-04-24 2013-09-18 奥利-本特·拉斯马森 从合金型热塑性聚合物制造定向膜的方法,用于此制程的设备及制成的产品
WO2004094129A3 (en) * 2003-04-24 2004-12-23 Ole-Bendt Rasmussen Method of manufacturing oriented films from alloyed thermoplastic polymers, apparatus for such manufacture and resulting products
WO2004094129A2 (en) * 2003-04-24 2004-11-04 Ole-Bendt Rasmussen Method of manufacturing oriented films from alloyed thermoplastic polymers, apparatus for such manufacture and resulting products
JP2006524150A (ja) * 2003-04-24 2006-10-26 ラスムッセン・オーレ−ベント アロイにされた熱可塑性ポリマーからの配向フィルムの製造方法、そのような製造のための装置、および得られる生成物
US9346220B2 (en) 2003-04-24 2016-05-24 Ole-Bendt Rasmussen Method of manufacturing an oriented film from alloyed thermoplastic polymers, apparatus for such manufacture resulting products
JP4841424B2 (ja) * 2003-04-24 2011-12-21 ラスムッセン・オーレ−ベント アロイにされた熱可塑性ポリマーからの配向フィルムの製造方法、そのような製造のための装置、および得られる生成物
WO2006048335A1 (en) * 2004-11-03 2006-05-11 Ole-Bendt Rasmussen Improved method of manufacturing an alloyed film and apparatus for the method
WO2006059087A1 (en) * 2004-11-30 2006-06-08 Cadbury Schweppes Plc Apparatus and method for extruding a product
CN101065022B (zh) * 2004-11-30 2012-09-05 卡德伯里控股有限公司 用于挤压产品的设备和方法
WO2010133195A1 (de) * 2009-05-18 2010-11-25 Cis Solartechnik Gmbh & Co. Kg Vorrichtung zum flexiblen schutz von bauelementen vor umwelteinflüssen
US9981454B2 (en) 2009-09-04 2018-05-29 MEGA PLAST Industrial—Exporting S.A. Polyolefin pre-stretched packaging film
US10414138B2 (en) 2009-09-04 2019-09-17 Megaplast S.A. Packaging Materials Industry Reinforced thin film for flexible packaging
EP3950257A4 (de) * 2019-03-29 2022-05-04 Mitsubishi Chemical Corporation Formartikel und verfahren zur herstellung eines formartikels

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US5019439A (en) 1991-05-28
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US5122322A (en) 1992-06-16
EP0337719A3 (de) 1991-01-16
DE68916311D1 (de) 1994-07-28

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